JPH0613977A - Mobile terminal - Google Patents

Abstract

PURPOSE:To provide a mobile terminal on which a time in a desired area is displayed automatically. CONSTITUTION:A clock circuit 18 of a cellular telephone set 7A counts a time in terms of a home-town time. Moreover, a ROM 15A stores time difference data with the home-town time for each position registration area. Upon the receipt of position registration area information through an antenna 11, a radio section 12 and a demodulation section 13 from a radio base station, a control section 16A reads the time difference data from the ROM 15A by using the position registration area information as an address and corrects the home-town time based on the time difference data and displays the time of the position registration area in which the telephone set 7A is in use onto a display section 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal device having a time display function, and more particularly to a mobile terminal device suitable for automobile telephones and the like used in a plurality of areas different from each other in standard time.

[0002]

2. Description of the Related Art When a mobile terminal device of this type is used by moving to a region belonging to an inter-standard zone different from that of a home memory station, the display time of this device is automatically set to the standard time of the region of use. Is desirable. Further, in the IC card-mounted mobile terminal device, displaying the standard time in the main usage area (hometown) of the IC card instead of the time in the usage area of the mobile terminal device is convenient for contact with the hometown. Is.

A mobile terminal device that automatically calibrates a display time is known as an MCA (Multi Channel Access).
s) For system use, it is disclosed in the published patent gazette (Patent application publication number: Hei 2-58937, publication date: 19).
90, 2, 28, title of invention: mobile communication system). This mobile terminal device receives reference time data from the radio base station and calibrates its own time according to this reference time data. Therefore, this type of mobile terminal device can be used to display the time in the standard time of the desired area.

[0004]

However, when the time data is added to the data information as described above, the circuit scale of the mobile terminal device increases for processing the time data, and a mobile terminal device having the simplest possible configuration is required. This is not preferable for car telephone systems, etc.

A first object of the present invention is to provide a mobile terminal device which can automatically display the time of the usage area even if the user moves to a different area of the standard time and has a simple structure.

A second object of the present invention is to provide an IC card type mobile terminal device capable of automatically displaying the standard time of a home town regardless of the area of the mobile terminal device used.

[0007]

In the mobile terminal device of the present invention, the position information creating means generates position information indicating which area of the standard time of the plurality of standard times is displayed. The time difference calculation means prepares time difference information concerning standard time of a plurality of regions obtained from the position information in advance, and calculates a time difference between the standard time corresponding to the position information and one of the standard times set separately in advance. . Further, the clock means generates time data measured according to one of the standard times. The time data correction means corrects the time data into standard time data of the area corresponding to the position information in response to the time difference. The time display means displays the time corresponding to this corrected time data.

One of the embodiments of the mobile terminal device is a cellular type car telephone. The mobile phone produces the position information in response to a radio signal from a radio base station. This position information may be an area identification code signal indicating the current position registration area of this mobile phone.

Another embodiment of this mobile terminal device is an IC card-mounted automobile telephone in the cellular system. The IC card stores hometown information of a person moving between a plurality of areas. The mobile phone uses the hometown information as the position information and reads the hometown information to the time difference calculation means. Therefore, this car telephone displays the standard time of the hometown on the time display means.

Yet another embodiment of this mobile terminal device is an IC card-mounted automobile telephone. This mobile telephone stores the use area of this telephone as position information in the position information storage means. On the other hand, the time difference between the standard time of the predetermined home town and the standard time of a plurality of usage areas including the usage area is stored in the IC card in advance. The IC card interface means reads the time difference between the use area and the home town from the IC card to the time data correction means, and the time correction means corrects the time data to the time data of the home town in response to the time difference. Therefore, the time display means displays the standard time of the hometown.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an automobile telephone system to which an embodiment of the present invention is applied.

This cellular car telephone system is a car telephone exchange office (M) of different areas in standard time.
TSO) 2a and 2b are connected via a fixed network 1. The MTSO 2a uses the location registration area 4a composed of a plurality of cells 5 as a service area and is connected to the radio base stations (BS) 6 installed in each of the cells 5. M
The TSO 2b also has a location registration area 4 including a plurality of cells 5.
BS corresponding to each cell 5 with b as a service area
6 are connected respectively. In addition, this car telephone system is a home memory station (H
The location registration area 4c of R) 3 and a number of location registration areas (not shown) are connected to the fixed network 1. These multiple location registration areas may have the same standard time or different standard times. Here, a mobile terminal device (M
S) 7A uses location registration area 4c as a home town, and H
R3 is the home memory station.

FIG. 2 is a block diagram showing one embodiment of the present invention.

Referring also to FIG. 2, the mobile terminal device 7A
Communicates with another mobile terminal device and the fixed network 1 via one of the BSs 6. That is, the antenna 1 of MS7A
1 receives a received wireless signal including an area identification signal of the location registration area 4a from the BS 6. The area identification signal is predetermined for each position registration area. Antenna 11
The radio unit 12 converts the received radio signal from the radio frequency signal into an intermediate frequency signal. In response to the intermediate frequency signal, a control unit 16A including a microprocessor (CPU) 31, a ROM 32A storing a program for operating the CPU 31 and a RAM 33 for calculation supplies an audio signal to the microphone 19 and outputs the area identification signal. Play in digital format. The control unit 16A also transmits a transmission signal to the wireless unit 12 in response to the data from the keyboard 20 and the audio signal from the speaker 21. The wireless unit 12 converts this transmission signal into a transmission wireless signal and transmits it from the antenna 11 to the BS 6
Send to. The line connection procedure between the BS 6 and the MS 7A is executed according to known means. Further, the synthesizer unit 14 is controlled by the control unit 16A to
The channel is switched to S6.

The clock circuit 18 of the mobile terminal device 7A produces time data measured in standard time in the position registration area 4c. The location registration area 4c is stored in the ROM 15A as a home town in the form of a regional code signal. Also, R
The OM 15A is prepared in advance with time difference data indicating the time difference between the standard time corresponding to each area identification signal that may be present in this car telephone system and the standard time of the area 4c. When the control unit 16A obtains the area identification signal from the BS 6 in the location registration area 4b, the area identification signal is stored in the ROM 1
The time difference data is read out as an address signal of 5A,
The time difference data is added to the time data measured by the clock circuit 18. Then, the control unit 16A transmits the time data corrected by the time difference data, that is, the standard time data corresponding to the reproduced area identification signal to the display unit 17, and the display unit 17 displays the standard time in the position registration area 4a. Is displayed.

The mobile terminal device 7A has a location registration area 4a.
When moving to the area 4b from, the MS 7A reproduces the area identification signal from the radio signal received from the BS 6 in the position registration area 4b, and displays the standard time of the area in which the position registration area 4b exists on the display unit 17.

Table 1 shows that the wireless base station (BS) 6 of FIG.
Standard EIA / TIA553 car telephone system (Ce
llll System, USA) and also IS-54 (Revision A) standard (D
ual-Mode Mob-ile Stat-ion
Compatibility Standard, J
an. 1991, ELECTRONIC INDUST
RISE ASSOCIATION issued) indicates the location of the area identification signal. This area identification signal is a system parameter overhead message (System) in the received radio signal from BS6.
em Parameter Over-head Me
14-bit S, included in Word1
ID1 (System identifier)
n) in the field.

[0019]

[Table 1]

Table 2 schematically shows the time difference data stored in the ROM 15A.

[0021]

[Table 2]

The service areas of the car telephone system shown in FIG. 1 are location registration areas 4a, 4b, 4c, 4d and 4e.
, Including the location registration areas 4a, 4b, 4c, 4
Any one of the five types of area identification signals representing d and 4e is included in the SID1 field. The ROM 15A of the mobile terminal device 7A stores the area identification signal indicated by the SID1 signal, that is, the position registration areas 4a, 4b, 4
The time difference corresponding to any of c, 4d, and 4e is stored as time difference data. Location registration area 4c is MS7
Since it is A's home memory location, the time difference in area 4c is naturally 0 hour. Further, the MS 7A displays the time when it is in the area 4a, which is one hour larger than when it is in the area 4c.

FIG. 3 is a flow chart for explaining the time display operation in the mobile terminal device 7A shown in FIG.

With further reference to FIG. 3, the user or operator of the mobile terminal device 7A first initializes the clock circuit 18 so as to measure the standard time of the location registration area 4c (step 21). When using MS7A, M
When the user turns on the power source (not shown) of S7A (step 22), the control unit 16A controls the synthesizer unit 14 to control a plurality of predetermined digitized control signals.
Channel (Ded-icated Control)
Channel: The D channel will be scanned (step 23). The receiving circuit of the wireless unit 12 detects the D channel indicating the maximum received electric field, and the control unit 16A selects the detected D channel (step 24). The control unit 16A includes an antenna 11, a radio unit 12, and a demodulation unit 13.
The D6 channel receives a radio signal received from the BS 6 via the B6, reproduces the overhead information message included in the received radio signal, updates the SID1 signal, that is, the area identification signal, and updates the paging channel (Paging Channel: hereinafter). , P
Channel) information is obtained (step 25). Control unit 16
A uses a plurality of Ps based on the instruction of the P channel information.
Scan the channels (step 26). Radio section 1
The second receiving circuit detects the P channel showing the maximum received electric field, and the control unit 16A selects the detected P channel (step 27). The MS 7A receives the received radio signal including the overhead information message from the BS 6 through the P channel (step 28).

The control unit 16A checks whether the SID1 signal in the overhead information message received from the P channel is the same as the SID1 signal received from the D channel (step 29). If the two SID1 signals match, the MS 7A shifts to the call mode according to the well-known call connection sequence (step 30), simultaneously receives the position registration parameter and performs the position registration operation (step 31). The process moves to the display time correction operation (steps 32, 33 and 34) described later. On the other hand, if the two SID1 signals do not match in step 29, the MS 7A returns to step 23.

At step 32, the control section 16A
The location of this MS7A is the location registration areas 4a, 4b,
An area identification signal capable of identifying which of 4c, 4d and 4e is detected from the SID1 signal. Control unit 16A
The CPU 31 reads the time difference data of the corresponding position registration area from the ROM 15A by using the detected area identification signal as an address signal, and adds the time difference data and the time data from the clock circuit 18 to generate corrected time data (step 33). ). This corrected time data is for Hometown 4
At the standard time of c, the time difference data of the position registration area 4a (+1
Time) is added. The display unit 17 includes the control unit 16
BS5 accessing corrected time data from A
The standard time of the position registration area 4a to which the user belongs is displayed (step 34).

As described above, since the mobile terminal device 7A automatically displays the time of the area where it is used, the user of the device 7A does not need to know the standard time of the area, and the device 7A does not need to know the standard time. There is a feature that the convenience of the user is improved.

FIG. 4 is a block diagram showing another embodiment of the present invention.

Referring to FIG. 4 and FIG. 1 together, the mobile terminal device (MS) used in the location registration area 4a
7B includes an antenna 11, a radio unit 12, a demodulation unit 13, a synthesizer unit 14, and a display unit 17 similar to those of the mobile terminal device 7A.
And clock circuit 18, microphone 19 and keyboard 20
And a speaker 21. Control unit 16B of this MS7B
The ROM 15B and the ROM 15B are substantially the same circuits as the control unit 16A and the ROM 15A of the MS 7A, but as will be described later, the programs stored in the ROM 32B incorporated in the control unit 16B and the data stored in the ROM 15B are slightly different from each other.

This MS7B is a microprocessor (C
PU) 231 and IC card 23 including ROM 232.
And an IC card interface unit 22 that constitutes an interface circuit between the IC card 23 and the control unit 16B. The MS 7B is a mobile terminal device body 4 including an IC card 23 and other components excluding the card 23.
1 and the card 23 can be mounted on any of the mobile terminal device bodies 41 belonging to this car telephone system. The IC card 23 is used for billing and the like, and stores the personal identification number of the MS7B user and the area code signal representing the hometown (position registration area 4c) in the ROM 232. The above personal identification number is IC
The card 23 is registered in the home memory station 3 which is the home town of the user. Therefore, the IC card-mounted MS7B user only has to move the IC card 23, and the IC card 23 can be moved to any mobile terminal device main body 4
Even if you attach it to 1, you can communicate with your own bill. It should be noted that the main body 41 is generally used in the position registration area of almost the same standard time, and the area code signal stored in the ROM 15B of the main body 41 is the position registration area 4a.

An IC card-mounted mobile terminal device 7
B is not limited to the car telephone system, but may be a mobile terminal device for other purposes, for example, a facsimile device. In this case, of course, the components for the facsimile machine are required.

The IC card 2 for the mobile terminal device 7B shown in FIG.
As shown in Table 3, one of No. 3 further prepares a time display data area in the ROM 232.

[0033]

[Table 3]

That is, the ROM 232 of the first type is RO
Using the area code signal stored in M15B as an address signal, the location registration area 4c which is the home town of the IC card 23 and the usable location registration areas 4a, 4b, 4c, 4d and 4e of the mobile terminal device body 41 are The time difference between them is stored in the form of time difference data. Since the location registration area 4c is the home memory location of the IC card 23, the time difference is naturally 0 when the main body 41 is in the area 4c.
It's time. When the IC card 23 is used in the area 4a as shown in FIG. 1, the time difference is -1 hour.

FIG. 5 is a flow chart for explaining one of the time display operations in the mobile terminal device 7B shown in FIG.

With further reference to FIG. 5, the IC card 23
The time display operation of the MS 7B wearing one of the
The position registration area 4a stored in B is clocked by the standard time (step 41). To use the MS7B, the user mounts the IC card 23 on the main body 41 (step 42). Then, the control unit 16B reads the area code number indicating the position registration area 4a from the ROM 15B and sends the area code number to the IC card 23 via the IC card interface unit 22 (step 43). The CPU 231 of the IC card 23 reads the time difference data (-1 hour) corresponding to the area code signal from the ROM 232, and the time difference data is read by the IC card interface unit 22.
To the control unit 16B via (step 44). The controller 16B adds the time data from the clock circuit 18 and the time difference data to calculate the corrected time data (step 45). The corrected time data represents the time measured by the standard time in the position registration area 4c. The control unit 16B sends the correction time data to the display unit 17, and the display unit 17 displays the time corresponding to the correction time data (step 4).
6). Therefore, the display unit 17 of the MS7B is the IC card 23
Hometown time will be displayed automatically.

Next, an embodiment in which the mobile terminal device 7B of FIG. 4 is equipped with another one of the IC cards 23 will be described.
In this embodiment, the time difference data is not stored in the IC card 23, but instead is stored in the ROM 15B of the mobile terminal device body 41 side.
Stores time difference data in the same format as in Table 3.

FIG. 6 is a flowchart for explaining another time display operation in the mobile terminal device 7B.

Referring to FIGS. 6 and 4 together, the IC card 23
The time display operation of the MS 7B equipped with the other one will be described. Steps 51 and 52 are the same as steps 41 and 42 of FIG. 5, respectively. In step 53, the IC card 23 reads the area code number indicating the location registration area 4c from the ROM 232 and sends this area code number to the control section 16B via the IC card interface section 22 (step 53). C of control unit 16B
The PU 31 reads out the time difference data (-1 hour) corresponding to the area code signal from the ROM 15B (step 5).
4). Hereinafter, steps 55 and 56 are also the same operations as steps 45 and 46 of FIG. 5, respectively, and the display unit 17 of the MS 7B automatically displays the hometown time of the IC card 23.

As described above, since the mobile terminal device 7B automatically displays the time of the hometown of the IC card 23 regardless of where it is used, the user of the device 7B has a troublesome time difference when contacting the hometown. It has the feature that it does not need to be calculated.

[0041]

As described above, the mobile terminal device of the present invention calculates the time difference between the current position and the hometown by using the unique area code signal of the mobile terminal device and the current position information separately obtained. Since the time and the use area time are automatically displayed, there is an effect that the convenience of the user of this mobile terminal device is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a car telephone system to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram of an embodiment of the present invention.

3 is a flowchart for explaining a time display operation in mobile terminal device 7A shown in FIG.

FIG. 4 is a block diagram showing another embodiment of the present invention.

FIG. 5 is a flowchart for explaining one of the time display operations in mobile terminal device 7B shown in FIG.

FIG. 6 is a flowchart for explaining another time display operation in the mobile terminal device 7B.

[Explanation of symbols]

 1 Fixed Network 2a, 2b Mobile Telephone Switching Office (MTSO) 3 Home Memory Station (HR) 4a, 4b, 4c Location Registration Area 5 Cell 6 Radio Base Station 7A, 7B Mobile Communication Terminal 11 Antenna 12 Radio Section 13 Demodulation Section 14 Synthesizer Section 15A, 15B ROM 16A, 16B control section 17 display section 18 clock circuit 19 microphone 20 keyboard 21 speaker 22 IC card 23 IC card interface section 32A, 32B ROM 33 RAM 231 CPU 232 ROM

Claims (15)

[Claims] 1. A position information creating means for generating position information indicating which one of a plurality of standard times belongs to a standard time area, and a clock means for generating time data measured according to one of the preset standard times. Time difference calculating means for obtaining a time difference between one of the standard times and a standard time of the area corresponding to the position information, and time data correction for correcting the time data to time data of the standard time corresponding to the position information in response to the time difference. A mobile terminal device comprising: means and time display means for displaying a time corresponding to the corrected time data. 2. The position information creating means includes a receiving means for generating demodulated data in response to a radio signal from a cellular radio base station, and a signal processing means for generating the position information in response to the demodulated data. The mobile terminal device according to claim 1, further comprising: 3. The mobile terminal device according to claim 2, wherein the position information is an area identification code signal indicating a current position registration area of the mobile terminal device. 4. The time difference calculation means stores a time difference data representing the time difference corresponding to each of the position information, and a first ROM that receives the position information.
The mobile terminal device according to claim 2, further comprising a reading unit that reads the corresponding time difference data from M, and the time data correction unit is an addition unit that adds the time data and the time difference data. . 5. The position information creating means is a second ROM for storing a use area corresponding to one of the standard times as the position information, and the time difference calculating means is provided with the standard time of the main use area and a plurality of times. An IC card that stores in advance the time difference from the standard time of the usage area, and the time difference of the usage area corresponding to the position information is read from the IC card to the time data correction means I
The mobile terminal device according to claim 1, further comprising a C card interface means. 6. The mobile terminal device according to claim 5, wherein the mobile terminal device is a cellular type car telephone. 7. The position information creating means includes an IC card for storing a main use area as the position information and an IC card interface means for reading the main use area to the time difference calculating means. The mobile terminal device according to item 1. 8. The mobile terminal device according to claim 7, wherein the mobile terminal device is a cellular type car telephone. 9. Receiving means for generating demodulated data in response to a radio signal from a cellular radio base station, and which standard time region of a plurality of standard times in response to the demodulated data belongs to. Signal processing means for generating position information, and clock means for generating time data measured by one of preset standard times of the plurality of standard times,
Time difference calculation means for calculating a time difference between one of the standard times and standard time corresponding to the position information, and time data correction means for correcting the time data into standard time time data corresponding to the position information in response to the time difference. And a time display means for displaying the time corresponding to the corrected time data. 10. The mobile terminal device according to claim 9, wherein the position information is an area identification code signal indicating a current position registration area of the mobile terminal device. 11. The first R storing means stores the time difference data indicating the time difference corresponding to the position information.
An OM and a reading unit that reads the corresponding time difference data from the first ROM when the position information is received, and the time data correcting unit is an adding unit that adds the time data and the time difference data. The mobile terminal device according to claim 10, wherein: 12. A position information storage means for pre-storing position information representing a use area, a clock means for generating time data measured according to the standard time of the use area, a standard time of a predetermined main use area and the use area. An IC card that stores in advance the time difference between each of the plurality of areas of use and the standard time, an IC card interface unit that reads out the time difference of the area of use corresponding to the position information from the IC card, and the time in response to the time difference. A mobile terminal device comprising: time data correction means for correcting data to time data of the main use area; and time display means for displaying time corresponding to the corrected time data. 13. The mobile terminal device according to claim 12, wherein the mobile terminal device is a cellular type car telephone. 14. An IC card for storing position information indicating which one of a plurality of standard times belongs to an area of the standard time, clock means for generating time data measured according to one of the predetermined standard times, and Time difference calculating means for reading out the position information and calculating a time difference between one of the standard times and the standard time corresponding to the position information, and correcting the time data to the standard time time data corresponding to the position information in response to the time difference. A mobile terminal device, comprising: a time data correction unit that performs the time data correction, and a time display unit that displays the time corresponding to the corrected time data. 15. The mobile terminal device according to claim 14, wherein the mobile terminal device is a cellular type mobile telephone.